I have this problem on the newest nvidia driver and newest claymore, win10, 6x Asus gtx 1070:

NVML API: failed to get device handle 4, error 15.

One card is not mining.
Seems to be Card Nr.4 out of 6, gets detected in Device Manager, but not in Claymore.
Also gets shown in Afterburner, but everything is grey and not changeable for that card.

Does someone know a solution to this problem?

Thanks for your help!